That explains a lot.
David made a good observation on the smaller ejector knob- it is too early for that gun.
The diamond on the barrel indicates a replaced part-the barrel (and ejector rod). The 14 patent date does too!
The star probably means a refinish.
So, it has a lot of rework, and therefore very little collector value.
In my experience, the aftermarket pearls are worth around 100.

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Regards,
Lee Jarrett